让人物变得透明

HBITMAP bit; 
HDC  MemDC;
HDC     DCBak;
CRect   rect;
int  w,h;
CString dir;
CString cc;

int  p;
char appdir[256];

int m0;
int m1;

BOOL getpic(CString cc,int p);
BOOL loadbmp(CString cc);
void TransparentBlt2(HDC hdc0,
      int nX0,int nY0,
      int nW0,int nH0,
      HDC hdc1,
      int nX1,int nY1,
      int nW1,int nH1,
      UINT Tcol
      );

定时器：

void ClearnDlg::OnTimer(UINT nIDEvent)
{
 //添加一个定时器其实用处很简单 不定的加载不同的图片在同一个地方
 CClientDC dc(this);
 int x=200,y=200; //人物所处的起始位置
 BitBlt(dc.m_hDC,x,y,100,100,DCBak,x,y,SRCCOPY);
 //BitBlt(dc.m_hDC,0,0,640,480,DCBak,0,0,SRCCOPY);地图重复被加载

 if(getpic("人",p)==FALSE)
  AfxMessageBox(cc+"没找到!");
 SelectObject(MemDC,bit);
 TransparentBlt2(dc.m_hDC,x,y,w,h,MemDC,0,0,w,h,RGB(255,255,255));
 p++;
 if(p>m1) p=m0;
 CDialog::OnTimer(nIDEvent);
}

转换透明的函数，还没看懂什么意思

void TransparentBlt2( HDC hdc0, 
      int nX0,int nY0,
      int nW0,int nH0,
      HDC hdc1,
      int nX1,int nY1,
      int nW1,int nH1,
      UINT Tcol
      )
{
 HBITMAP hBMP   =CreateCompatibleBitmap(hdc0,nW0, nH0);//创建一幅与设备有关位图，它与指定的设备场景兼容
 HBITMAP mBMP   =CreateBitmap(nW0,nH0,1,1,NULL); 
 HDC  hDC    =CreateCompatibleDC(hdc0);
 HDC  mDC    =CreateCompatibleDC(hdc0);
 HBITMAP oldBMP =(HBITMAP)SelectObject(hDC, hBMP);
 HBITMAP oldmBMP=(HBITMAP)SelectObject(mDC, mBMP);
 if (nW0==nW1&&nH0==nH1)
  BitBlt(hDC,0,0,nW0,nH0,hdc1,nX1,nY1,SRCCOPY);
 else
  StretchBlt(hDC,0,0,nW0,nH0,hdc1,nX1,nY1,nW1,nH1,SRCCOPY);

 SetBkColor(hDC, Tcol);
 BitBlt(mDC,0,0,nW0,nH0,hDC,0,0,SRCCOPY);
 SetBkColor(hDC, RGB(0,0,0));
 SetTextColor(hDC, RGB(255,255,255));
 BitBlt(hDC,0,0,nW0,nH0,mDC,0,0,SRCAND);
 SetBkColor(hdc0,RGB(255,255,255));
 SetTextColor(hdc0,RGB(0,0,0));

 BitBlt(hdc0,nX0,nY0,nW0,nH0,mDC,0,0,SRCAND);
 BitBlt(hdc0,nX0,nY0,nW0,nH0,hDC,0,0,SRCPAINT);

 SelectObject(hDC, oldBMP);    
 DeleteDC(hDC);
 SelectObject(mDC, oldmBMP);
 DeleteDC(mDC);
 DeleteObject(hBMP);
 DeleteObject(mBMP);
}

void ClearnDlg::OnBnClickedOk()
{
 CClientDC dc(this);
 p=0;
 m0=0;
 m1=100;

 MemDC = CreateCompatibleDC(0);//暂存设备场景
 DCBak = CreateCompatibleDC(0);

 GetCurrentDirectory(256,appdir);
 dir=appdir;

 //加载地图
    cc=dir+"\\图片\\地面.bmp";
 if(loadbmp(cc)==FALSE)
   AfxMessageBox(cc+"没找到!");
 SelectObject(DCBak,bit);
    GetWindowRect(rect);
 BitBlt(dc.m_hDC,0,0,640,480,DCBak,0,0,SRCCOPY);

 SetTimer(1,150,NULL);
}

void ClearnDlg::OnBnClickedCancel()
{
 // TODO: 在此添加控件通知处理程序代码
 DeleteDC(MemDC);
 DeleteObject(bit);
 DeleteDC(DCBak);
 OnCancel();
}